Over the past two decades, the high hydrogen content and favorable dehydrogenation conditions of multi-metallic amidoboranes have gained significant attention for their potential in hydrogen storage. Among them, Al-based complex hydrides have shown promise because of their high polarizing power, light weight, and abundant natural presence. In this work, we successfully synthesized two novel tetrahedrally coordinated Al-based amidoboranes, namely, Li[Al(BH3NHCH2CH2NHBH3)2] and Na(THF)[Al(BH3NHCH2CH2NHBH3)2], using BH3NH2CH2CH2NH2BH3 (EDAB) as a precursor. The structure of Na(THF)[Al(BH3NHCH2CH2NHBH3)2] was determined through modeling based on synchrotron powder X-ray diffraction. Additionally, the formation of the Al-N bond in Li[Al(BH3NHCH2CH2NHBH3)2] and Na(THF)[Al(BH3NHCH2CH2NHBH3)2] was confirmed with IR spectra. Na(THF)[Al(BH3NHCH2CH2NHBH3)2] is more stable in air than Li[Al(BH3NHCH2CH2NHBH3)2]. Importantly, thermal gravimetric analysis and mass spectroscopic characterization confirmed that both compounds release hydrogen without the presence of ammonia, diborane, or ethylenediamine. Our work represents the first example of Al-based amidoboranes with chelation coordination geometry, which provides an essential foundation for understanding the relationship of complex multi-metallic amidoboranes in terms of synthesis, structure, and properties.
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Background: Adolescence is a critical time for nutritional intervention to support growth, yet understanding of adolescent nutritional status is limited. This study examines the patterns and determinants of nutritional status among adolescents in Abakaliki, Ebonyi State, Nigeria. Method: A cross-sectional study was conducted among 1073 public secondary school attending adolescents aged 10-19 years in Abakaliki. Sociodemographic data were collected using self-completed questionnaires, while weight and height were measured to derive Height for Age (HAZ) scores and Body Mass Index (BMI)-Z scores based on the 2007 WHO growth reference chart. Data analysis included univariate, bivariate, and multivariate methods using SPSS version 26. The ethics committee at the Federal Teaching Hospital Abakaliki approved the research. Results: Of the 1,073 participants, 64.4% were female. Slightly over half (51.6%) were middle-aged adolescents, with 3.4% underweight, 8.8% overweight, 8.7% stunted, and 1.6% tall for their age. The BMI-Z score was associated with sex, class, and fathers’ and mothers’ education (p = 0.001; 0.04; 0.01; 0.001). The HAZ score was associated with age group (p = 0.00). Multivariate analysis revealed that sex and both parents’ educational status strongly predicted BMI status, with females being about 16 times more likely (P = 0.00) to be overweight than males. Additionally, age, class, sex, and mother’s education was predictive of height Z score. Conclusion: Underweight and stunting are associated with early adolescence, male gender, and low parental education. Regular nutritional assessments can identify at-risk individuals for targeted interventions to improve adolescent nutrition, including educational programs for students and parents.